Namespaces - introduced in PHP V5.3 - are a way of giving your PHP classes, constants, and functions context so that elements with the same names can be understood as being unique.

在PHP V5.3中引入的名称空间是为php类、常量和函数提供上下文的一种方式，从而可以将使用相同名称的元素看作是惟一的。

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In fact, this is precisely what's taking place: in a functional language, functions are first-class concepts, like variables and constants, and so are syntactically treated as such.

事实上，真正发生的事情是：在函数语言中，就像变量和常量一样，函数是一级概念，所以语法上也是一样地处理。

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If we can calculate the partition functions for molecules, and they undergo reactions and they're in equilibrium, we should be able to calculate the equilibrium constants.

如果我们能计算分子的配分函数，而分子反应处于平衡状态，我们应该能够计算出平衡常数。

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